Message queue monitors

LGMSG

Long message queue utilization

This monitor reports the percentage of the long message queue data set in use during the sampling period. The percentage is calculated as the ratio of allocated records to the total number of records in the long message queue data set.

ILGMSG

QBLKS

Queue blocks utilization

This monitor reports the percentage of the QBLKS message queue data set in use during the sampling period. The percentage is calculated as the ratio of allocated records to the total number of records in the QBLKS message queue data set.

IQBLKS

QIO

Queue I/O

This monitor reports the total number of queue I/Os performed during the sampling period. The number includes both read and write queue I/Os.

IQIO

QWAIT

Queuing waits

This monitor reports the total number of queuing waits that occurred during a sampling period. Queuing waits include the following:

• Waits for an available buffer
• Waits for other DECB to read
• Waits for other DECB to write
• Waits for purge
• Waits for buffer ENQ/DEQ

IQWAIT

SHMSG

Short message queue percent utilization

This monitor reports the percentage of the short message queue data set in use during the sampling period. The percentage is calculated as the ratio of allocated records to the total number of records in the short message queue data set.

ISHMSG

SMQEX

Shared message queue (SMQ) pool expansion

This monitor reports the number of times the shared message queue pool expanded.

ISMQEX